A juggling pattern or juggling trick is a specific manipulation of props during the practice of juggling. Descriptions of patterns and tricks have been most common in toss juggling. A juggling pattern in toss juggling is a sequence of throws and catches using a certain number of props which is repeated continuously. Patterns include simple ones such as the cascade and complex ones such as Mills mess. A juggling trick in toss juggling is a throw or catch which is different from the throws and catches within a pattern. Tricks include simple ones such as a high throw or more difficult ones such a catch on the back of the jugglers neck. Systems of juggling notation have been created to describe juggling patterns and tricks. One of these is siteswap notation.